Matching of regular expression in string in Julia – match() and eachmatch() Methods
The match()
is an inbuilt function in julia which is used to search for the first match of the given regular expression r in the specified string s and then returns a RegexMatch object containing the match or nothing if the match failed.
Syntax:
match(r::Regex, s::AbstractString, idx::Integer)
Parameters:
- r::Regex: Specified regular expression.
- s::AbstractString: Specified string.
- idx::Integer: It specifies the point from which the searching get started.
Returns: It returns a RegexMatch object containing the match or nothing if the match failed.
Example:
R = r "G(.)G"
println(match(R, "GFG" ))
println(match(R, "Geeks" ))
println(match(R, "gfgGfG" ))
println(match(R, "GFG" , 1 ))
println(match(R, "GFG" , 2 ))
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Output:
RegexMatch("GFG", 1="F")
nothing
RegexMatch("GfG", 1="f")
RegexMatch("GFG", 1="F")
nothing
eachmatch()
The eachmatch()
is an inbuilt function in julia which is used to search for all the matches of the given regular expression r in the specified string s and then returns a iterator over the matches. If overlap is true, the matching sequences are allowed to overlap indices in the original string, otherwise they must be from distinct character ranges.
Syntax:
eachmatch(r::Regex, s::AbstractString; overlap::Bool)
Parameters:
- r::Regex: Specified regular expression.
- s::AbstractString: Specified string.
- overlap::Bool: Specified overlap boolean value.
Returns: It returns a iterator over the matches.
Example:
R = r "G(.)G"
println(eachmatch(R, "GFG" ))
println(eachmatch(R, "GeeksforGeeks" ))
println(eachmatch(R, "Geeks" ))
println(eachmatch(R, "GFG" , overlap = true))
println(collect(eachmatch(R, "GFGGfGGeekGeeks" , overlap = true)))
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Output:
Last Updated :
20 Apr, 2020
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